1834 - Thomas Davenport of Vermont developed the first real electric motor ('real' meaning powerful enough to do a task) although Joseph Henry and Michael Faraday created early motion devices using electromagnetic fields.
Below is a more detailed usage of operating systems according to age group: 18 to 34 years old. Of all the smartphone users, 50% use Android as operating system, 43% use iPhone, 39% use Microsoft and 38% use RIM. Apparently, more users prefer Android.
Classification of Operating systems. Operating systems provide a software platform on top of which other programs, called application programs, can run. The application programs must be written to run on top of a particular operating system. Your choice of operating system, therefore, determines to a great extent the applications you can run. For PCs, the most popular operating systems are DOS, OS/2, and Windows, but others are available, such as Linux. Recommended Reading: The History of Windows Operating Systems (Windows OS) from 1985 to present day.